Fastening inserting machine



Dec. 29 1925. 1,567,428

R. E. DU'PtES-SiS FASTENING INSERTING MACHINE Filed Oct. 8, 1921 III/I/l/l/j, I?

Fig.3.

Patented Dec. 29, 1925.

UNITED STATES raren'r creme.

REN'E E. DUPLESSIS, OF BEVERLY, MASSACHUSETTS, AS SIG-NOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON,'NEW JERSEY, A CORPORATION OF NEW JERSEY.

FASTENING IDTSERTING MACHINE.

Application filed OctoberS, 1921. Serial No. 506,399.

To all whom it may concern Be it known that I, RnNIi E. Durnnssrs, a citizen of the United States, and resident of Beverly, in the county of Essex and State of Massachusetts, have invented certain Improvements in Fastening Inserting Machines, of which the following description,

1n connection with the accompanying drawings, is a specification, like reference characters on the drawings: indicating like parts in the several figures.

This invention relates to fastening inserting mechanisms and is illustrated as embodied in a hand tacker such as is commonly used in the manufacture of shoes. It is an object of the invention to provide a fastenine' inserting mechanism which shall be reliable in action, simple and inexpensive to manufacture, and convenient to take down and assemble. I

With these objects in view the invention is disclosed as embodied in a hand tacker, features of which include the attachment of the separator by a readily detachable bearing; the operation of the separator by the driver itself; the extension of the raceway clear to the throat block and separator of the tacker; the mounting of the driver in its carrier in such manner as to permit the former to line up with the throat even though the parts are not exactly true; and the shaping of the driver so as to insure the rocking of the fastenings about the point of contact of their heads and the driver so as to move their shanks towards the driver to facilitate the passage of the separator between the endmostfastening and the one adiacen thereto.

With the above and other obiects and features in view the invention will now be described in connection with the accompanying drawings whichillustrate a preferredembodiment thereof and pointed out in the subjoined claims.

In the dra-wings, n

' Fig. 1 is a side elevation of a hand tacker constructed in accordance with the present invention, certain parts being shown in sectic)n;-' i r Fig. 2 is an exploded view of the throat block, separator and driver of the tacker of Fig. 1;

Fig. 3 is a cross-section of the driver on the line 3-3 of Fig. 2;

Fig. 4 is a perspective view of the separator; and

Fig. 5 is a similar view of the lower end of the raceway.

The'tacker of the drawings is provided with a plunger case 10 having an upward and lateral projection 11 to which is secured the raceway 14- Slidably mounted in the plunger case is a plunger 15 which may conveniently be constructed and operated as disclosed in United States patent to Joseph E. Crisp and Leander D. Judkins. No. 500. 225, granted June 27 1893. Carried by the lower end of the plunger is a driver 19 formed at its upper end with a cam surface 21 for a purpose hereinafter explained and provided also with a substantially cylindrical portion 23 arranged to enter a corresponding undercut groove 25 formed in the lower end of plunger 155. Groove 25 is of such dimensions as to permit a small amount of lateral movement of the driver, either angularlv or rectilinearly or both, so that in assembling the parts the lower end of the driver may conveniently be lined up with the throat even though the plunger is out of 30 alinement with the throat or the parts are not exactly true.

Near its lower end the plunger case is cut away to provide a seat for the throat block 27. the latter being formed, as indicated at 29 (Fig. 2) so as. in co-operation with the separator 31, to form the throat opening. The separator is illustrated as in the form of an arm 33 having one end of a notch or hook formation 35 so as to be readily detachable from its pivot pin 37 mounted in the throat block 27. At its other end the separator is formed with a tack controlling and separating finger 39 beneath which is a block 41 provided with a tack controlling groove or surface 43 and a cam surface 45 arranged to co-operate with cam 21 of the driver so as to rock the separator away from the is provided with a pair raceway at the completion of the tack inserting stroke of the driver. A spring A? is mounted upon the side of the raceway and tends to return the separator into position to cause the separation of a tack from the raceway when the elevation of the driver permits.

The raceway 14 is extended at its lower end so as to reach clear to the throat opening formed in the throat block and separator, as indicated in Fig. 5, the points 19 serving to support the fastenings until they reach the throat. Beneath points 49 the raceway of fastening retainers 51, 53 arranged to restrain lateral movement of the shanks of the fastenings.

Near its upper end the driver 19 is provided with a groove 55, arcuate in crosssection, the radius of curvature of the sur face of this groove being substantially the same as that of the heads of the tacks. At its lower end the bottom of this groove is preferably inclined to the driver in the direction of its length.

As indicated in Fig. 1 the raceway is provided with a cover 57 formed with a pair of brackets 59 secured to the front of the raceway.

The tacker is provided with the usual nozzle 61, with a hook 12 for attaching it to a raceway section by means of which it may be supplied with fastenings, and with appro priate devices including a book 16 for controlling the passage of tacks to the upper end of the raceway and for the prevention of their escape therefrom.

The operation of the device will now be described. Vhile at rest the driver occupies the position of Fig. 1 with a tack in the position indicated in dotted lines, its head being held between the throat block and the lower portion of groove 43 of the separator. When the plunger is depressed to dr ve a fastening the driver moves down and comes into contact with the head of the fastening, the separator being cammed hack sufliciently to allow the fastening and the end of the driver to pass down into the nozzle. 'Ihis comparatively slight movement of the separator is not enough to permit the escape of a tack from the raceway. As the driver continues its downward movement cam 21 comes into contact with cam surface 15 of the separator and swings the separator back so that it passes clear of the raceway and permits the endmost tack therein to move down until stopped by the driver. When the plunger starts upward under the influence of the plunger spring the friction between the driver and the head of the fastening-adjacent thereto, as well as the camrr-ing action of the lower end of the bottom of the groove 55 of the driver, causes the fastening to rock about the line of contact of its head and the driver so that the shank of the ta-- tening swings towards the driver thus permitting finger 39 of the separator to move between that fastening and the next. When the driver reaches its uppermost position the separated fastening drops down into the position indicated in dotted lines in Fig: 1, the other fastenings being restrained by the separator.

At any time when it becomes necessary to remove the separator, for example on account of a jam which may be caused by a misshaped fastening, it is only necessary to push spring A7 out of engagement with the separator after which the latter may b swung forward about its pivot 37 and then completely removed without the use of tools so as to give access to the throat. By a reverse process the separator may be replaced equally readily.

Having described my invention, what I claim as newand desire to secure by Letters Patent of the United States is 1. A tacker having, in combination, a throat-block, a separator formed with a surface co-operating with a surface on the throat-block to form a throat opening, said separator being mounted for swinging movement into and out of the path of movement of tacks toward the throat to control the passage of the tacks to the throat, a driver, and means carried by the driver remote from its tack-engaging end to control the operation of the separator.

2. A tacker having, in combination, a throat-block, a magazine, a separator formed with a surface co-operating with a surface on the throat-block to form a throat opening, said separator being mounted for movement into and out of the path of movement of tacks from the magazine to the throat to control the passage of the tacks from the magazine to the throat, a driver, and a cam formed on the driver re mote from its tack-engaging end to control the operation of the separator.

3. A tacker having, in combination, a throat, a driver, a magazine, and a separator arranged to control the passage of tacks from the magazine to the throat and to retain a tack in the throat until the driver reaches the throat, said driver being formed with a cam surface remote from its tackengaging end arranged to co-operate with a corresponding surface formed upon the separator to control the operation thereof.

A tacker having, in combination, a throat, a driver, a magazine, and aseparator comprising a tack-engaging finger arranged to control the passage of tacks from the magazine to the throat and to retain a tack in the throat until the driver reaches the throat, said driver having a camv surface formed thereon remote from its tack-engaging end arranged to co-operate with a corresponding surface formed upon the separator to control the operation thereof.

5. A tacker having, in combination, a throat-block, a driver, a magazine, and a separator mounted for swinging movement into and out of the path of movement of tacks in the magazine to control the passage of the tacks from the magazine to the throat and to retain a tack in the throat until the driver reaches the throat and provided with a surface co-operating with a surface on the throat-block to form a throat opening, said driver having a cam surface formed thereon and arranged to co-operate with a corresponding surface formed upon the separator ,to control the operation thereof.

6. A tacker having, in combination, a throat, a separator arranged to control the passage of tacks to and from the throat, and a driver arranged for reciprocation through the throat, the separator being formed with a cam surface arranged for engagement by the leading end of the driver to cause the separator to move sufiiciently to release a tack in the throat, and the driver being formed remote from its leading end with a cam arranged later in the cycle of operation to engage the separator and to force the separator away from the raceway sufficiently to permit the passage of a tack in the raceway past the separator.

7. A tacker having, in combination, a plunger case, a plunger in said case, a throat carried by said case, and a driver directly connected to the plunger for reciprocation through the opening in the throat in such manner as to permit play between the driver and the plunger so that the driver may line up with the throat even though the plunger is out of line with the throat.

8. A tacker having, in combination, a throat, a magazine, and a separator arranged to control the passage of tacks from the magazine to the throat, the separator being formed. remote from its tack engaging surface with a hook arranged to have a bearing upon .a pin carried by the tacker.

9. A tacker having, in combination, a supporting part and a separator, the two parts being connected by a pivotal bearing one member of which is hook shaped to permit ready detachment of the separator.

10. A tacker having, in combination, a separator carrying part, a separator carried thereby for swinging movement, and a spring tending to hold said parts in assembled relation, said separator being detachable without the use of tools upon displacement of the spring.

11. A separator for a tacker having a tack engaging surface and a hook remote from said surface arranged to form a portion of a pivotal bearing for the separator.

12. A separator for a tacker having a tack engaging surface and a notch remote from the tack engaging surface and arranged to form a portion of an easily detachable hearing for the separator.

13. A hand tacker having, in combination, a throat, a magazine provided with a raceway for tacks, a separator arranged to con trol the passage of tacks from the raceway to the throat, and a driver, the separator being formed with a surface arranged to retain a tack in alinement with the opening of the throat and actuated by the tack engaging portion of the driver to move the separator sufficiently to permit the passage of the tack and the tack engaging portion of the driver past the separator, the separator also being formed with a second tack engaging surface arranged normally to retain the tacks in the raceway but withdrawn during the final portion of the fastening inserting movement of the driver by engagement of a cam surface formed upon the driver with a co-operating portion of the separator completely to withdraw the separator from the raceway to permit a tack to feed from the raceway into contact with the driver.

14. A tacker having a driver arranged during its retrograde movement to contact frictionally with the head of a fastening and grooved to insure rocking movement of the fastening about the point of engagement of the driver and the head of the fastening to move the shank of the fastening towards the driver.

15. A tacker having, in combination, a raceway and a driver reciprocable adjacent to the end of the raceway and formed with a cam surface remote from its fastening engaging end arranged, as the driver is withdrawn after fastening inserting movement, to contact with the head of the endmost fastening in the raceway in such manner as to cause that fastening to rock about the point of contact of its head and the driver so as to cause the shank of the fastening to move towards the driver.

In testimony whereof I have signed my name to this specification.

RENE E. DUPLESSIS. 

